Question: Question 3. Students are required to create 6-character long passwords to access the library. The letters must be from lowercase letters or digits. Each password

Question 3.

Students are required to create 6-character long passwords to access the library. The letters must be from lowercase letters or digits. Each password must contain at most three lowercase-letters and contains no repeated digits. How many valid passwords are there? You are required to show your work step-by-step. [9 marks]

Note:1hfg21is invalid because 1 appears more than once. 134ggg is valid because there are 3 lower-case letters, and no digits is repeated.

Please explain the answer in full! Many thanks!

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

3. Students are required to create 6-character long passwords to access the library. The letters must be from lowercase letters or digits. Each password must start with "a" or "b", it also must...

Question 3 Students are required to create 5-character long passwords to access the library. The letters must be from lowercase letters or digits. Each password must start with a lowercase letter and...

1 ) Answer the following questions. Explain your reasoning: a ) Without using the truth table, prove if the following statements are tautologies or not. Show your reasoning. [ 4 marks ] i ) ( ) ii )...

Students are required to create 6 - character long passwords to access the library. The letters must be from lowercase letters or digits. Each password must contain at most two lowercase - letters...

Students are required to create 6-character long passwords to access the library. The letters must be from lowercase letters or digits. Each password must start with a or b, it also must contain at...

Students are required to create 6 - character long passwords to access the library. The letters must be from lowercase letters or digits. Each password must contain at most two lowercase letters and...

Note: kindly fill the box with how choice we have in all different cases while explaining it briefly. Students are required to create 6-character long passwords to access the library. The letters...

Find the future value at a rate r, compounded continuously for T years, of a continuous income stream with rate of flow f(t) = kect, where c and k are constants, c r.

If A = {1, 2, 3, 4, 5, 6, 7}, fl = {2, 4, 6, 8, 10, 12}, and f:A B where f = {(1, 2), (2, 6), (3, 6), (4, 8), (5, 6), (6, 8), (7, 12)}, determine the preimage of B1 under f in each of the following...

f you invest $ 1 0 0 every month into VOO, a Vanguard S&P 5 0 0 exchange - traded fund, that tracks the S&P 5 0 0 ( the S&P 5 0 0 is a stock market index tracking the stock performance of 5 0 0 of...

The first scenario will be a Verbal Judo scenario in which your scenario follows the standard Verbal Judo interaction: You need to ask somebody to modify their behavior either to do something or to...

2. Delineate seven ways that cultural variables affect communication

3. Shake up your clothing and artifacts today. Wear something completely out of character for you, and consider how people react. If you normally dress very casually, try wearing a suit, or if youre...

2. Record a new episode of your favorite scripted television show. Try watching it with the sound turned all the way down (and closed captions turned off ). Can you guess whats going on in terms of...